Alberto García

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The surfaces of 63 extracted premolar teeth were processed with intense ultrashort laser pulses (λ = 795 nm; pulse duration, 120 fs; repetition rate, 1 kHz) to produce cross patterns with different pitches (s) in the micrometer range in order to evaluate the influence of such microstructures on the shear bond strengths of orthodontic brackets to enamel. The(More)
This paper describes MiBiblio, a highly personalizable interface to large collections in digital libraries. MiBiblio allows users to create virtual places we term personal spaces. As users find useful items in the repositories, they organize these items and keep them handy in their personal spaces for future use. Personal spaces may also be updated by user(More)
The European Anchovy (Engraulis encrasicolus, Linnaeus, 1758) represents one of the most important fishery resources in some areas of the Mediterranean. This short-lived, small pelagic fish is characterized by large interannual fluctuations, probably as a result of environmental variability. As part of the European Project Med 98-070, the main aim of which(More)
The 8993 T > G mutation in mitochondrial DNA has been associated with variable syndromes of differing severity ranging from maternally inherited Leigh’s syndrome (MILS) to neuropathy, ataxia, retinitis pigmentosa (NARP), depending on the mutation loads in affected patients. We report a kindred with several members in the same generation suffering NARP or(More)
This study aims to evaluate the effect of laser irradiation and orthophosphoric acid etching on the shear bond strength (SBS) of orthodontic brackets to enamel. Three groups (n = 20) of extracted premolar teeth were randomly established depending on the laser treatment performed on the buccal surfaces: (1) no laser (control); (2) Er:YAG laser (2,940 nm, 0.8(More)
This work investigates the spatial distribution and species composition of mesopelagic fish larvae and their relationship with the main oceanographic events in the area studied. Samples were collected during a hydrographic and ichthyoplanktonic survey carried out in the Strait of Sicily in July 2000. Sorting revealed that 1258 out of the 4098 fish larvae(More)
10 0 0 2 3 0 4 0 0 2 0 0 2 5 0 0 0 6$ 0 7789+ $ 4 0 0 :! ;:!< 0 3 0 0 0 6$ 0 7789+ $ = >>)> 1 4 0 0 2 4 0 0 0 6$ 77*9+ ; ? 0 >>)> 1 ( 2 2 2 40 0 4 0 ' 3 0 = 0 6? 7779+ @ 0 $ 0 4 0 0 0 0 0 >>)> 1 + 10 A40 * 0 2 4 0 + ! 0 2 8 0 0 4 0 0 2 0 + ! 0 0 0 4 0 2 0 0 + 4 0 4 3 ( 0 + B > 2 0 4 4 3 0 2 5 2 + C 0 2 D 0 4 C 4 3 3+ $0 0 = # 4 + < E 3 4 + ? 4 *+D A+ '< 6 +(More)
The aim of this in vitro study was to evaluate the morphological changes that occur in tooth enamel after mechanical instrumentation and after femtosecond laser irradiation with different parameters via light and scanning electron microscopy (SEM). Twelve totally impacted third molars were collected and sectioned to provide several cut surfaces. These(More)
The aim of the present study was to evaluate the influence of erbium:yttrium–aluminum–garnet (Er:YAG) and Ti:sapphire laser irradiation on the microtensile bond strength (MTBS) of three different adhesive systems to dentin. Flat dentin surfaces from 27 molars were divided into three groups according to laser irradiation: control, Er:YAG (2,940 nm, 100 μs,(More)
This paper analyzes some of the factors that prevent knowledge construction and reuse in traditional library settings and describes VRef, an environment designed to provide users with the functionality of digital libraries in the areas of collaboration and social construction of knowledge. VRef makes it possible for users to post their information needs to(More)